Thermally Stable Mesoporous Poly(ether sulfone) Monoliths with Nanofiber Network Structures,Macromolecules

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Thermally Stable Mesoporous Poly(ether sulfone) Monoliths with Nanofiber Network Structures
Macromolecules ( IF 5.1 ) Pub Date : 2017-12-28 00:00:00 , DOI: 10.1021/acs.macromol.7b02217
Sadaki Samitsu ₁

Affiliation

The facile fabrication of mesoporous materials using commodity polymers and improvements in the thermal and mechanical stabilities of the mesopores remain challenging. Herein, we report thermally stable, mechanically robust mesoporous monoliths made of commercially available poly(ether sulfone) (PES). A PES solution dissolved in N,N-dimethylformamide spontaneously formed a physical gel upon cooling to moderate temperature and/or mixing with benzene due to partial crystallization of PES. Mesoporous monoliths obtained from this gel had a reticular structure composed of nanofibers with an average diameter of 18 nm in conjunction with a high specific surface area of 206 m²/g. The dense reticular structure showed a large total pore volume of 2.95 cm³/g, including a significant mesopore volume of 0.52 cm³/g. The nanofiber structure together with the high glass transition temperature of PES significantly enhanced the thermal stability of the mesopores, 80% of which were maintained even after aging at 150 °C for 600 h.

中文翻译：

具有纳米纤维网络结构的热稳定介孔聚醚砜整料

使用商品聚合物容易地制造介孔材料以及改善介孔的热稳定性和机械稳定性仍然是挑战。本文中，我们报道了由市售的聚醚砜（PES）制成的热稳定，机械坚固的介孔整体材料。溶于N，N-二甲基甲酰胺的PES溶液在冷却至中等温度和/或由于PES的部分结晶而与苯混合后自然形成了物理凝胶。由该凝胶获得的中孔单块具有网状结构，该网状结构由平均直径为18nm的纳米纤维和206m ² / g的高比表面积组成。致密的网状结构显示出2.95 cm ³的大总孔体积/ g，包括显着的中孔体积0.52 cm ³ / g。纳米纤维结构以及PES的高玻璃化转变温度显着增强了中孔的热稳定性，即使在150°C老化600 h后，中孔的热稳定性也得以保持。

更新日期：2017-12-28

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